Ladder-jack.



W. G. WINANS.

LADDER JACK.

APPLICATION FILED JULY 27 1914.

' L14 ,6'?n Patented June 22,1915.

WITNESSES: MI [/5 N T 0/? W i a. W

111E NORRIS PETERS C0, PHOTUJJTHO, WASHINGTON. D

WESLEY G. WINANS, OF DETROIT, MICHIGAN, ASSIGNOE, BY DIRECT AND MESNEASSIGNMENTS, TO WINANS MANUFACTURING COMPANY, OF BETH/GIT, MICHI- AN, ACORPORATION OF MICHIGAN.

LADDER-JAGK.

Lid fith. Specification of Letters Fatent- Patented June 22, 1915.

Application filed July 27, 1914.

To (a l 207mm it may concern provided with a downwardly-extending lug orpro ection J, forming a retainer for engaging the ladder rung to preventd1sen- Serial No. 853,298.

outer standard of the ladder, since by so arranging the jack it may beadjusted either up or down upon the standard, without gagement of theU-shaped members during Be it known that l, lWEsLEY G. WINANS,adjustment of the arm E. However, no a citizen of the United States ofAmerica, appreciable stress is transmitted tothe rung residing atDetroit, in the county of Wayne of the ladder, but the load istransmitted tb and State of Michi an, have invented oerthe edges of thestandard through the beartain new and useful Improvements in Ladings CD, will be readily understood. der-Jacl-Is, of which the following is aspeci- The bearing C is secured to the section B float-ion, referencebeing had therein to the by bolts K L or other suitable securingaccompanying drawings. .means, and the member D is similarly at- Myinvention relates to ladder jacks, and tached to the section B by boltsM N, has among the objects thereof to provide a though the manner ofattaching the memsimple and eilicient structure, to provide a bers C Bmay be varied as desired, or these ladder jack that may be easily andquickly members formed integral with the section adjusted upon theladder'and which will be B. In order that the arm E may be horifirmlyheld in its adjustedposition, to prozontally arranged. in variouspositions of ride a device in whicln-irresp ective of the angularityof'the ladder, the inner end of ai'igularity of the ladder- -thesupporting the arm E is adjustably attached to the secarm may behorizontally arranged, to protion B, as by being pivotally connectedride a structure that will not become accithereto through the medium ofthe bolt L. dentally disengaged from the ladder, and The brace F in thestructure shown is pivto provide jack in which the load carried otallyconnected to the member B through by the same will be transmitted to thestandthe medium of the bolt N. The outer end ards of the ladder;further, to provide a ladof the brace F carries a bolt Q that is arderjaclrwhich is collapsible and which may ranged within a longitudinalslot P in the be compactly folded; and other objects of arm E. Q is athumb nut upon the bolt 0, the invention will more fully hereinafterwhich may be tightened to clamp the outer appear. end of the brace F tothe arm E in its dif- The invention resides in the peculiar conferentpositions of adjustment. Preferably, struction, arrangement andcombination of the slotted portion P is provided with a pluparts, ashereinafter set forth and as par- 'rality of spaced teeth. R, formingbearings ticularly pointed out in the claims. for the bolt 0. In thedrawings,Figure 1 is a perspec- Preferably, the brace F and arm' E aretive view of a device embodying the'invenformed of angle-shaped crosssection, as tion; Fig. 2 is a similar view showing the I shown,-theslotted portion P being formed jack collapsed; Figs. 3 and 4 illustratethe in the downwardlyextending flange of the manner of applying the jackto the ladder; arm E, while the other flange of said arnr Fig. 5 shows aposition of the jack for adterminates in an upwardly-extending lug S,justing its position upon the ladder. forming a stop for the edge of theflange T Referring to the one embodiment of the or other support carriedby the jack. invention illustrated in the drawing, Aillus- In use,assuming the jack is to be applied trates the jack, composed of asection B havto the ladder to extend inwardly, as shown ing spacedbearings G and D for engaging a in Fig. 3, the bearings G D are engagedwith standard of the ladder, a laterally-extendthe standard of theladder preferably so ing arm E, and a brace F. The bearings O that oneof the projections J engages over are composed of il -shaped stripssecured a rung. The brace F is then adjusted to ento the section B toface in an opposite digage the arm E horizontally. The coiiperrection,so that when the base of the U- ating jack A is similarly arranged uponthe shaped member C engages the outer edge G second ladder B, as shownin Fig. 3, and of the ladder standard'H the base of the the plank orlike support placed upon the member D will engage the under edge I ofarms E. 7 said standard. Each of the members C D is As will be noted,the jack is applied to the being removed therefrom, by merely turningthe section B so that the ends of the U-shaped bearings will clear therungs, as shown in Fig. 5.

If the jack is to be applied to the ladder to extend outwardly, it isarranged as shown in Fig. 4. When not in use, by removing the thumb nutQ from the bolt 0 and withdrawing the latter from the slotted portion P,the parts may be compactly folded as shown in Fig. 2. In this figure, itwill be noted that the members E F B are substantially parallel with oneanother.

From the foregoing description, itwill be apparent that my improvedconstructlon of ladder jack is one that may be easily and quicklyapplied to the ladder, may be readily adjusted toproperly support theplank or gage the ladder standards, an arm pivotally Copies of thispatent may be obtained for connected to said section adj acent one endof the latter, a brace pivotally connected to the section adjacent'theopposite end, and an adjustable connection between the other end of saidbra'ce and said arm.

' -2. A ladder jack, comprising a section :liaving oppositely facingbearings for engagingjthe standard of the ladder, and a .laterallyextending arm carried by said sec tion, saidsection being adjustablelongitudinally'oi' the standard 'while in engagement therewith.

3. A ladderjack, comprising a section having U-shap'ed bearings facingin opposite directions adjacent opposite ends thereof, the ends of saidbearings terminating in outwardly-extending flanges,.an armpivotallyconnected to said section adjacent one end of the latter, abrace pivotally connected to the section adjacent the opposite end, andan adjustable connection between the other end of said brace and saidarm.

l. A. ladder jack, comprising a section having a bearing secured theretoadjacent one end, a second and oppositely facing bearing adjacent theopposite end of said section, said bearings being adapted to engage thesame ladder standard, and a latorally-extending arm carried by saidsection, said jack being adapted to be attached to the ladderirrespective of the angulnrity thereof.

5. A ladder jack, comprising a section having bearings facing inopposite direc tions secured thereto, a normally laterallyextending armformed of angle-shaped cross-section, a slotted portion provided with aplurality of teeth in the downwardlyextending flange of said arm, and abrace pivotally connected to said section and en.- gaging said teeth.

6. A ladder jack, comprising a section having bearings, alaterally-extending arm of angle-shaped crossscction connected to saidsection, a brace baring one end secured to said section and adjustablyconnected to said laterally-extending arm, and a portion of thehorizontal flange of said laterally-extending arm bent up to form a lugon said arm.

7. A. ladder jack, comprising a rigid section having oppositely facingbearings for engaging a standard of the ladder, a laterally-extendingarm carried by said section, and a brace connected to said section andadjustably engaging said arm.

In testimony whereof I ailix my signature in presence of two witnesses.

\VESLEY G. WINANS.

Witnesses:

\VM. J. BELKNAP, 'JAMns P. BARRY.

five cents each, by addressing the Commissioner of Patents Washington,1). G.

